Event: Division 3

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Opponent Rating Result
David O Vaughan 1854 0 - 1
John Lightowler 1685 ½ - ½
John H Sleggs 1516 0 - 1
Greta Bullman 1534 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1347 = (6589 + 400 * (0 - 3)) / 4)

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